initialize django project
new api added
including:
add_node add_link delete_node delete_link search_json_node search_json_link
LDAP CONFIG COMPLETED && group-based control added

the server will authenticate user using the LDAP server, and some views are limited before comfirming the GROUP that user belongs to.
fix a bug in IGENServer.urls

err: 'module' object has no attribute 'urls'
convert db_name from igemdata to igemdata_new
convert db_name from igemdata to igemdata_new
fix a small bug in url
Merge branch 'master' of git.ailuropoda.org:igem-ustc_software/igemserver into feiyicheng
fix a small bug in urls
static configration added
static file added to urls.py
static file added to urls.py(trial 2)
static file added to urls.py(trial 3)
static file added to urls.py(trial 4)
static file added to urls.py(trial 5)
fix 400 Bad Request Error
document added
login/logout views added
CSRF verification closed
fix a minute syntax error